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GUT-OFF MECHANISM FOR SPINNING AND TWISTING MAOE[INES 155455521.Patented July 7,1891.

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GUT-OPE MECHANISM FOR SPINNING AND TWISTING MACHINES. N0.455,521.'Patented July 7,1891;

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UNITED STATES PATENT Gianna WILLIAM E. \VALSH, OF LOWELL,MASSACHUSETTS.-

CUT-OFF MECHANISM FOR SPIN NINGAND TWISTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 455,521, dated July 71891. Application filed April 17, 1889- Serial No. 307,566. (No model.)

To all 2072,0172, it may concern: v

Be it known that I, IVILLIAM E. \VALsH, of Lowell, in the county ofMiddlesex and State of Massachusetts, have invented a certain new anduseful Improvement in Cut-OE Mechanisms for Spinning and TwistingMachines, of which the following is a specification.

My. invention relates to spinning and twisting machines; and it consistsin certain new and useful constructions and combinations of the severalparts relating' to the cut-oif mechanism for the yarns, substantially ashereinafter described and claimed.

In the drawings, Figure 1 represents an end view of a twisting-machine,showing the application of my invention. Fig. 2 is an enlarged view of aportion of the same for the purpose of showing its construction moreclearly. Fig. 3 is a front side View of Fig. 2. Fig. 4 is a front sideview of the apparatus for adjusting the mechanism for doffing, Fig. 5 isan end view of the same.

A is the frame of the twisting-machine.

S is the spindle driven by the band .9 from the drum D in the usualmanner.

g is a guide above the spindle, through which the thread passes.

R R are rollers, between which the threads pass from the bobbins B B tobe twisted together by the action of the spindle.

\Vhen a thread breaks down in passing from the bobbins B B to thespindle, a large amount of waste is made unless some device can be usedto check it, and improvements in this part of the device are the objectof my invention.

Between the bobbins B R' I'attach to the frame of themachine a stand 1,which has a shelf 2 projecting horizontally from its upper part andpresenting a flat face on its bot-tom surface. Below this shelf 2 Ipivot to the stand by the pivot 3, passing through lugs on the stand,the cut off plate 4 in such position as to be capable of having its freeend swing against the lower face of the shelf 2 and cut off the threadswhen brought into action by the breaking of one ofthem. Through thecut-01f plate 4 I pass the wire arm 5, carry it around underneath thelower roller Rd, and provide it with B and the rollers R,

an eye 6 on its end, which projects upward between the rollers R R andthe, guide g. This wire arm is attached to the cut-off plate 4 by meansof two check-nuts 7 '7, screwed upon a thread cut on the arm, so thatthe position of the arm may be shifted in the cut-off plate 4, both toalter the position of the eye 6 at its outer end to bring it intothe-proper alignment between the roller; R R and the guide gand tobalance the cut-off plate properly on its pivot, as may be desirable. Onthe same thread of the arm as the nuts is screwed the weight 8, whichcan be adjusted in or out to counterbalance the wire arm properly tobring it to the delicate adjustment necessary to bring the cut-off plateinto operation when the thread breaks. The cut-off plateis provided'witha thumb-piece 9, projecting above it, in order to be readily accessibleto the operator in pushing the plate backward to pass the thread throughwhen piecing up the ends.

Above the shelf 2 is a flange 10, attached to the stand 1, which ismade. inclined or curved on its upper edge, as shown, so as to form aconvenient V-shaped opening between itself and the thumb-piece 9, intowhich the thread may be inserted in piecing up to bring .it intoposition under the shelf 2 over the cut-off plate. The cut-off plate isprovided with a blade 11, of steel or other suitable material, screwedto its upper side by set-screw 12 in position to form the cutting-edgewhich is to act against the shelf 2 and arrest and cut off the threads.This blade may, therefore, be renewed from time to time, when .worn,cheaply and easily without disturbing the rest of the mechanism.

Between the bobbins B B and the cut-off plate is located a guide 13,screwed into the stand ,1, so as to be adjusted up and down by screwingit through the stand more or less to bring the thread intoproperalignment over the top of the lower roller R, so that it shalljust pass betweenthe small space left between the blade ll and shelf 2,when the cutoff plate is tipped back, without dragging or wearing uponeither the blade or shelf while they are in that position. This guide issecured in position by the check-nut 20.

The dotted line 14:, Fig. 2, shows the operation of the parts, Thedouble thread passes through the guide 13, over the lower roller R,

and through the eye 6 at the end of arm 5 and through the guide g, whichis slightly above the .eye 6, so as to lift on the eye and keep theparts operating in the posit-ion shown. WVhen oneor both of the threadsbreak, the strength of the remaining one is insufficient to sustain thearm 5 in its upward position, and it falls down and brings the blade 11of the cut-off plate against the shelf 2, and cuts off the thread atthat point because the rollers R R draw on the ends of the threads,causing the blade 11 to nip tighter to the shelf'2. I

WVhen the bobbin is to be doffed from the spindle S, it becomesnecessary to keep the cut-off plate out of action, and this isaccomplished by the sliding bar 15, which works on a bar 16, attached tothe frame of the machine underneath the arm 5. The lower face of the bar15 is provided with inclines 17, which work on corresponding inclines 18on bar 16, Fig, 4, so that asbar15 is slid along endwise it rises upunder the Wire arm 5 and holds it in the position shown in Fig. 2. Thisbar enables the dofier when the bobbin is doffed to hold open one ormore of the arms 5, if

there be more than one in the frame, because the bar 15 may be made longenough to reach under more than one of the arms 5, if desired, and asingle motion will throw the cut-off out of action.

The wire arm 5 may be adjusted in the cutoff plate 4 so as to beproperly balanced by means of the check-nutsfi 7, instead of by theweight 8, if desired.

\Vhat I claim as new and 1. The combination, in a twisting-machine, ofthe guide g, rollers R R, shelf 2, cut-off plate 4:, with itscutting-edge pivoted to the frame and operating with said shelf, as described, and provided with the arm 5 andits eye 6, reaching around saidroller R to a point between the latter and said guide, the lifterbar 15,provided of my invention frame of the machine, arranged to raise saidarm and hold the cut-01f plate out of engagement with the shelf 2.,substantially as described.

2. The combination, in atwisting-machine, of shelf 2, provided with theinclined wing 10, projecting upward from it, with the pivoted cut-offplate 4:, provided with the thumbpiece 9, projecting upward opposite tosaid inclined wing and forming with the latter a guiding slot or openingfor the introduction of the thread through the same and between theshelf 2- and its cut-off plate, substantially as described. 7 7

\VM. E. \VALSH.

Vitnesses:

.GEo. H. STEVENS,

DANLl R. WALLACE.

with inclines 17 17, and the. corresponding inclines 18 18, attached tothe

